Furnace.



y Wig.,

E. WARREN.

FURNACE.

APPLICATION FILED DEC.29, |916.

` 1.524,2 l 'Y v Patented Nov.. 27, 191?.

2 SHEETS-SHEET l.

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APPLICATION FILED DEC29 191G- 2 SHEETS-SHEET 2- .ELI WARREN, or WICHITA, Kansas.

Funnncn.

Specification of Letters Patent.

Patented Nov. 2*?, 1917.

y Appiication inea. December a9. 191e. serial No. leases.

To all whom t may concern.' l

Be it known that I, `ELI jlVARREN, a citizen ofthe United States, residing at Wichita, in the county of Sedgwick and State of Kansas, have invented new and useful Improvements in Furnaces, of which the following is a specification.

The invention relates to an improvement in furnaces designed particularly for heating air for delivery to a remote point, the construction involving an arrangement of parts whereby the most effective use is made of the heat from the fuel for heating the an'.

The main object of the present invention is the provision of a hot air furnace in which the heat from the fuel and the escaping products of combustion are utilized to initially heat the air in the cold air duct and to travel lengthwise the air duct in both directions to insure a maximum heating edect.

The invention in the preferred form of details will be described in the following specification, reference being had particularly to the accompanying drawings, in which Figure 1 is a perspective view of the improved furnace.

Fig. 2 is a section on line 2-2 of Fig. 3.

Fig. 3 is an enlarged longitudinal central section through the furnace.

Fig. 4L is a section on line le-4 of Fig. B.

In the accompanying drawings, wherein is shown the preferred type of furnace, it will be noted that the same is constructed to include a body 1 having side walls 2, front wall 3 and rear wall 4. The body is formed in its forward portion to provide the usual fire box 5 in which is arranged the usual grate 6, the side wall of the furnace being provided with doors 7 and 8 closing openings leading to the fire box, and ash pit.

Opening over the top wall 9 4of the body is a stack 10, the same being arranged adjacent the forward wall of the body as shown. Interiorly of the body is arranged a partition plate 11 and in spaced parallel relation therewith and with the top wall 9 of the body is arranged a second partitionplate 12. The partition plates 11 and 12 extend the full width of the body, that is the full distance between the side walls 2, but both terminate in advance of the rear wall l as clearly shown in Fig. 3. The space between the partition 12 and top wall 9 of the body is in open communication with the stack 1() and has communication with the space below the partition 11 through the medium of curved walls 13 and 14.` which connect respectively to the ends of the partitions 11 and 12 and to the top and bottom walls of the body, forming a conduit to establish communication between the space on the lower side of the partition 11 with the space between the top wall 9 and partition 12 of the body.

The space below the partition 11 and above the partition 12 constitutes what will be hereinafter termed the smoke conduit, as it is in open communication at one end with the fire box and at the opposite end with the stack.

What I term a cold air pipe 15 is laid from any suitable source of power of cold air supply to the front wall 3 of the furnace lengthwise the smoke duct beneath the partition 11 and at the rear end of the said partition turns upwardly in the form of an elbow 16 and is secured to the ring 17 encircling an opening 18 in the partition 11 whereby the cold air duct is in open communication with the space between the partitions 11 and 12, which space as previously described, is closed against the smoke duct. A. plurality of hot air outlet pipes 19 communicate with openings formed in the partition 12 so as to establish communication between said pipes and the space between the partitions 11 and 12, the pipes opening through the top wall 9 of the body and leading to different points of distribution, as is usual in furnaces of this type.

From the above description, it will be understood that the cold air duct is arranged within the smoke conduit so that the products of combustion completely encircle said cold air duct to initially heat the air, and that said air in its travel longitudinally of the, what may be termed air duct, is further heated by the products of combustion passing lengthwise the space between the partition 12 and top wall 9. |lhe air of course passing out of the pipes 19 is encircled by the products of combustion and further heated. A most effective utilization of the heat is thus secured and I am enabled thereby to deliver a much larger quantity of highly heated air with the same fuel supplied tha-n is ordinarily accomplished in furnaces of this type.

The construction as described is in no wise limited as to material and size of the variu ous parts, it being contemplated that different types of furnaces may be constructed and various materials employed as may be desirable in the particular instance.

What is claimed is A hot air furnace comprising a hollow body having a re box, Vspaced partitions eX- tending from one end of the body to a point at a distance from the opposite end, a hori- Zontal air tube connected with the partitions at the end spaced from the body, the upper partition being spaced from the top of the opies of this patent may be obtained for and the upper partition is provided for the products of combustion.

' In testimony whereof I affix my signature.

` ELI WARREN.

ve Cents efch, addressing the Commissioner of Patents, Washington, D. C. Y y 

